A Duplex Pump is different than a two stage pump. A Duplex pump has two impellers, one for capacity (volume) and one for pressure. The Pump has three setting: Capacity, Volume, and Series. Series has the Volume Impeller feeding the Pressure Impeller. This Pump is much underrated at only 500 GPM.

The current browser does not support Web pages that contain the IFRAME element. To use this Web Part, you must use a browser that supports this element, such as Internet Explorer 7.0 or later.